HPAC Magazine

Articles

Article Hydronics

Piping layouts to avoid in hydronic systems

February 15, 2017 John Siegenthaler

Einstein’s definition of insanity was doing the same thing over and over and expecting different results. If that is true, there are some “insane” hydronic system designers in North America. They repeatedly cling to certain system piping configurations, even though

Article CoolingEngineeringForced AirHeatingHVAC Systems

How do you say quality is in the air?

February 15, 2017 Ian McTeer

Contractors and technicians find themselves on the front line trying to help occupants obtain the benefits of cleaner air. The American philosopher, naturalist and historian, Henry David Thoreau, best known for his 1854 book, Walden, wrote, “What is the use

Article Hydronics

More pointers for commercial pumps

February 14, 2017 Mike Miller

In HPAC’s December 2016 issue the article Troubleshooting Pointers for Commercial Pumps discussed some of the more common but simple reasons for pump issues that may be resolved without major work. This article serves as a continuation of that discussion

hydronic water chemistry
Article

How water behaves in hydronic systems

February 13, 2017 Mark Olson

Designers of modern hydronic systems strive for two important objectives: a reliable system and an energy efficient system. Achieving these requires proper equipment selection as well as attention to water quality. Unfortunately the latter is often overlooked, or left to

refrigeration defrost
Article HVAC SystemsRefrigeration

Introduction to refrigeration defrost methods — Part I

February 10, 2017 Dave Demma and Bob Schindler

It is inevitable that refrigeration systems operating with saturated suction temperatures below freezing will eventually experience an accumulation of frost on the evaporator tubes and fins. The frost serves as an insulator between the heat to be transferred from the

Article ConstructionCoolingForced AirHeatingHPAC GeneralHVAC Systems

Get HVAC systems off to a good start

December 21, 2016 Ian McTeer

Whether it is a Canadian general election or a U.S. presidential contest, there always seems to be one candidate will promise to stimulate the economy by cutting taxes, relaxing regulations, eliminating red tape, and reducing the size of government. This

Article EngineeringHydronicsPlumbing

We need thermal storage tanks with lower standby loss

December 19, 2016 John Siegenthaler

Thermal storage tanks play an important role in several types of hydronic heating and cooling systems. This is especially true of systems with renewable energy heat sources such as solar thermal collectors, heat pumps, or biomass boilers. The most common

Article ControlsEngineeringHydronics

Troubleshooting pointers for commercial pumps

December 18, 2016 Mike Miller

When troubleshooting commercial pumps it is always important to note the type of symptoms, the point at which the symptoms began and the time period over which the symptoms developed. In particular, consider whether something changed in the system prior

Article EngineeringHydronics

The effect of heating coil performance on boiler efficiency and system complexity

December 17, 2016 Robert Bean

Lately I have been noticing during reviews that designers are selecting fan/coils without regard to system efficiency and control simplicity. A few extra minutes of evaluation can add several efficiency points while eliminating the need for mixing strategies. Let’s start

Article HPAC GeneralPlumbing

In it for the long haul

December 16, 2016 Doug Picklyk

A Canadian has landed in the Guinness World Records as the oldest actively employed plumber, and at 92 years old, Lorne Figley of Saskatoon, SK has no intention of laying down his wrench any time soon. It was Figley’s daughter,

Article HVAC SystemsRefrigeration

Common causes of refrigerant leaks and how to fix them

December 15, 2016 Dave Demma

I met with a supermarket chain recently and the subject of refrigerant leaks came up. This is not surprising given the fact that R22 prices continue to escalate as the supply continues to shrink. I asked the director of facilities

Article ControlsForced AirHeatingHPAC GeneralHVAC Systems

Beyond the furnace tune-up

October 26, 2016 Ian McTeer

A furnace tune-up is really a comprehensive maintenance job. Contractors know that it is essential to maintain a long-term relationship with every customer by providing timely preventive maintenance (PM) at least once per year. It is better to work with

Siegenthaler
Article ControlsEngineeringHydronics

Changing flow direction for optimal heat exchanger performance

October 26, 2016 John Siegenthaler

Many systems with renewable energy heat sources also have large thermal storage tanks. Examples include systems using biomass boilers and solar thermal collectors. I call these heat sources “wild” since they can operate over a wide range of conditions and

refrigeration,walk-in boxes
Article ConstructionControlsEngineeringHPAC GeneralHVAC SystemsRefrigeration

How to size refrigeration correctly for the box and application

October 26, 2016 Dave Demma

The key to a properly operating walk-in box system starts with a good design and the basis of a good design is to accurately determine what the refrigeration heat load is. To do this one has to realize that heat

water usage
Article HPAC GeneralPlumbing

Technology exists to move Canada closer to the European average water usage, the only obstacle is ourselves

October 26, 2016 Steve Goldie

“Water, water, every where, And all the boards did shrink; Water, water, every where, Nor any drop to drink.” It has been 40 years since I first read these words in my high school English class and for some reason

Construct Canada,The Buildings Show
Article ConstructionControlsCoolingEngineeringForced AirGeothermalGreen TechnologyHealth & SafetyHeat PumpsHeatingHPAC GeneralHVAC SystemsHydronicsManagementPlumbingRefrigerationSolar

Show Preview: Construct Canada 2016

October 26, 2016 Doug Picklyk

The 28th annual Construct Canada show, the country’s largest building, design and construction event, will run Wednesday, November 30 through Friday, December 2 in downtown Toronto at the Metro Toronto Convention Centre, located at the base of the CN Tower.

Article HPAC GeneralManagement

The 4 Rs of selling in a competitive market

October 26, 2016 Mark Evans

What is the right path to success in business? There are many answers to this question and for every answer opinions abound as to which one is right. Everyone would agree that finding success is one thing, keeping it is

Article ConstructionControlsCoolingEngineeringForced AirHeatingHPAC GeneralHVAC SystemsHydronics

It is time HVAC system design grew up

October 25, 2016 Robert Bean

Recently Wilma Leung, my new favourite sage, and her progressive team from BC Housing-Homeowner Protection Office hosted 340 builders and affiliated service providers from British Columbia to participate in my class on thermal comfort for vulnerable populations. The program included

HRAI,Belimo,Ellul
Article HPAC GeneralHVAC SystemsManagement

Proactive approach sets tone for HRAI’s 48th annual conference

October 21, 2016 Kerry Turner

The Heating, Refrigeration and Air Conditioning Institute (HRAI) held its annual conference August 24 to 26 at the Hyatt Regency in Calgary, AB. Themed Making Every Connection Matter, the event opened with a Year in Review presentation. While reviewing material

water conservation,Gustafson
Article Plumbing

Saving big with little changes

October 21, 2016 Jon Gustafson

Professionals looking to boost water conservation often set their sights on the biggest — and often most expensive — water-using equipment in a facility. But while big-ticket items are an important part of overall conservation, there is a lot to

CIPHEX West
Article ConstructionHVAC SystemsHydronicsPlumbing

Trade show features full conference program, including hydronics

October 21, 2016 by Kerry Turner

In addition to 30,000 square feet of exhibits, CIPHEX West trade show will also feature a full conference program, new product showcase, the Canadian Hydronics Conference and the new Executive Summit. Held at the Vancouver Convention Centre, CIPHEX West is

Article ConstructionEngineeringGreen TechnologyHeatingHydronicsPlumbingSolar

Solar thermal runs hot and cold

October 17, 2016 Robert Waters

Having been involved with the solar water heating (SWH) industry since the early 1980s, I can tell you that it has faced many challenges. A look at its history in Canada reveals that SWH has been on a roller coaster

pellet boiler,John Siegenthaler
Article ConstructionHeatingHydronics

Making the switch from oil-fired to a pellet-fired boiler

September 8, 2016 John Siegenthaler

During the last two years I have been reviewing submittals for proposed heating systems using pellet-fired boilers. They come from heating professionals ranging from installers to professional engineers. These submittals are required to participate in a state incentive program that

radiant,radiant energy,radiant heating,Robert Bean
Article ConstructionCoolingEngineeringHeatingHVAC SystemsHydronics

The continuum of radiant myths

September 6, 2016 Robert Bean

Back in 2004 I penned an article called Radiant Mythology: 22 Myths about Radiant Heating. In the years since the first copyright of the article on www.healthyheating.com, that article has brought me the immense pleasure of watching tightly-wound individuals implode

Article ConstructionControlsCoolingGreen TechnologyHPAC GeneralHydronics

Trends that mean good news for the hydronic industry

August 31, 2016 Steve Goldie

When I sat down to write this article, my intention was to take a look at some of the most common issues in residential hydronic installations and examine the remedies. In the interest of not being repetitive I did a

Winnipeg James Armstrong Richardson International Airport
Article ConstructionCoolingEngineeringHeatingHVAC SystemsHydronics

Active floors hit the mark at Winnipeg airport

August 28, 2016 Russell Lavitt

How to heat and cool a very large, nearly all-glass building, while hiding the sources of warmth and cooling. As a significant public building, the Winnipeg James Armstrong Richardson International Airport has large expanses of heated and cooled floors as

glycol levels
Article ConstructionEngineeringHydronics

How to match glycol levels to various HVAC systems

August 24, 2016 Rob Waters

Glycol is a mystery fluid to many in the HVAC industry, but it is an essential tool for designing many different types of HVAC systems. In Canada, where glycol is essential to protect HVAC systems from freezing, most contractors have

hydronic system
Article ConstructionCoolingHeatingHVAC SystemsHydronics

Twelve comparisons between hydronics and VRF/VRV systems

August 23, 2016 John Siegenthaler

Hydronics technology has long been known for unsurpassed heating comfort. It has also been used for cooling, primarily through chilled water distribution systems in commercial and institutional buildings. This well-established and highly successful track record is, in part, based on

Article ConstructionEngineeringHVAC SystemsHydronics

Control logic for fluid temperature control

August 22, 2016 Mike Miller

We come across so many different types of terminology in our industry that not everyone is fully aware of their meanings. The following is some of the most basic control logic terminology with a short explanation of what each means

Article ConstructionCoolingEngineeringRefrigeration

Current technologies are available to modulate system or compressor capacity

August 19, 2016 Dave Demma

It is morning again. You get ready for the day and make your way out to the garage where your car is waiting for the morning’s commute to work. You start the engine, make sure your radio is tuned to